Blue 42 is a cadence or snap count to keep the offense On rhythm with the snap count…. Blue 42, Blue 42 set set. Hike or go maybe even a silent signal for go. 3-28Reply. 1.

All NFL teams have cadences, whether that be a verbal signal with number combinations or lifting their leg in the air. The most common phrase to use is blue 42 because it rhymes and has been featured in many movies.

The phrase "blue 42" originated in American football as a code word used by quarterbacks to communicate with their offensive team before the ball is snapped [2]. It is part of the quarterback's cadence, which is a series of numbers and words used to signal the offense when to start moving and initiate the play [2].